I have pre-purchased it already
I don't know if i will like it, but i would buy it even if it was a total crap. I am 100% sure, that i will not play it more then 10 h in any case. But i want to support developers, and 14 Euros is not a big deal. A family sized pizza costs more where i live. If you can afford it - buy it!
Mount&Blade is original and, in many ways, unique title! If developers will close - M&B will die, like many other original games. If they sell enough copies, they might start on M&B2, or develop something new from scratch. cRPG would not exist without Warband, so i feel like i own them